Fig. 1From: Evaluation of the theoretical optimal angle of the tibial tunnel in transtibial anatomic posterior cruciate ligament reconstruction by computed tomographyCT sagittal section: L1 was measured from the proximal vertex of the tibial marrow cavity to the tibial plateau along the anatomic axis of the marrow cavity; TOA was measured between the tibial plateau and the extension cord that connecting the center of PCL insertion site with a point 5 mm superior from the marrow cavity vertex (hollow white arrows); L2 was measured from from anterior tunnel aperture to anterior end of tibial plateauBack to article page